The perfect frosting/icing for cakes, this is the ideal kind of frosting for decorating.
Beat together the butter and icing with a mixer until well combined, smooth and creamy.
Add the vanilla and hot water.
Beat some more and use!
If you want it to have a chocolaty taste and colour, substitute the vanilla essence with 2 tbsp. cocoa powder. For a different colour, just add a few drops of the colour of your choice and mix.